Plunger



A. JOHNSON.

PLUNGER DRUM.

APPLICATION FILED SEPT-I9, I919.

Patented June 27, 1922.

2 SHEETS-SHEET I.

IIHII'IIIIIIIIII A. JOHNSON.

PLUNGER DRUM.

APPHCATION FILED SEPT. 19, |9|9.

1,420,844. Patented June 27, 1922.

2 SHEETS-SHEET 2.

lllll lllllllu lllll UNITE s'rarrgs ARON JOHNSON, OF \VOODHAVEN, NEW YORK.

PLUNGER DRUM.

Application filed September 19, 1919.

To all whom it may concern Be it known that I, ARON JoHNsoN, a citizen of the United States, and resident of lVoodhaven, in the county of Queens and State of New York, have invented certain new and useful Improvements in Plunger Drums, of which the following is a specification.

My invention relates to improvements in plunger drums for assembling machines, such as are used in the manufacture of crown caps for bottles, and it is my object to produce a plunger drum which may be adj usted to receive caps properly from the assembling mechanism, which will consume a minimum of power to operate and which can be quickly and easily repaired when necessary.

My plunger drum is used primarily in the type of machine shown in U. S. Letters Patent No. 1,134,031, dated March 30, 1915, and applies pressure to the assembled caps whlle the adhesive between the metal shell and sealing gasket is setting.

In the drawing Fig. 1 is a side view of my plunger drum, partly in section; Fig. 2 a fragmentary view of the top of the drum; Fig. 3 a side view of the lifting cam; Fig. 4 a bottom view of the bottom plunger ring; Fig. 5 a fragmentary view of the cap supporting plate; and Fig. 6 a detail of the plunger drum assembly.

The frame 1 of the machine has a bearing 2 carrying a shaft 3. A cap supporting plate 4 is secured to the shaft and has a gear 5 secured to its lower side which is driven by a pinion G operated from any suitable part of the machine.

A pair of plunger rings 7 and 8 are $6- cured together, but spaced apart, by pillars 9. These rings are provided with plunger holes 10, which holes in the upper and lower rings are in line. The plunger rings 7 and 8 are secured to the cap supporting plate 4 by cap screws 11 which pass through the slots 12 in the lower ring 7 (see Figs. at and 6) and engage the tapped holes 13 in the lugs 14 on the cap supporting plate.

The plungers 15 are flattened on each side at the top and a roller 16 is mounted on a stud 17 on the outside face. A spring 18 is placed between the upper and lower rings 7 and 8 and the plunger inserted through the opposed holes 10, inside the spring, which is compressed against the upper ring and held by a pin 19 inserted in a hole 20 in the plun- Specification of Letters Patent.

Patented June 27, 1922.

Serial No. 324,956.

ger. This causes the spring 18 to exert a downward pressure to the plunger. To prevent rotation of the plungers in the holes a guard ring 21 is secured to the upper plunger ring 8 with its outer edge slightly fiattened and contacting with the inner fiat face of each plunger thus preventing rotation of the latter in its bearing. This guard ring is preferably made in sections so that by removing a section and removing the pin 19 any plunger may be lifted out for repairs or the replacement of a damaged spring.

Adjacent the plunger ring and mounted on the machine frame is a bracket 22 carrying a cam 23 which is located in the path of travel of the rollers 16 at the point where the caps are delivered to the cap supporting plate from the assembling mechanism. This cam is secured to the bracket by cap screws 24 which pass through slots 25 in the cam so it may be adjusted to lower the plungers at any desired point. The cam has an easy lift a and a quick drop I) as shown in Fig. 3.

In operation the drum is rotated and receives the assembled caps under the plungers which have been lifted by the cam. The plungers leave the cam and are forced down by the spring pressing the caps between the cap supporting plate and the end of the plungers during a practically full rotation of the drum and until the adhesive has set when the plungers are lifted and the finished caps removed from the machine.

Should the plungers be so located that instead of centrally seating on the caps they strike the edges it is only necessary to loosen the cap screws 11 and slightly rotate the upper and lower rings 7 and S, with their assembled plungers, until the plungers are properly located when the cap screws are tightened and the rings and plungers locked in place.

I claim 1. A plunger drum comprising a cap supporting plate, a pair of plunger guide rings secured to said plate, plungers in said guide rings and means for adjusting said guide rings and plungers circumferentially with respect to the plate.

2. A plunger drum comprising a cap supporting plate, a pair of plunger guide rings secured to said plate, plungers in said guide rings, each plunger having a roller on its upper, outer face adapted to contact with a cam, the inner, upper plunger face being flattened and a guard ring secured to the upper plunger ring contacting with the flat, inner face of the plungers to prevent rotation thereof in the guide rings.

3. A plunger drum comprising a cap supporting plate means for rotating said plate, a pair of plunger guide rings secured to said plate, plungers i n said guide rings, a stationairy cam adjacent the pluug' r drum adapted "to contact with the plungers on rotation of the drum, and means for adjustii'ig said cam eircuinferentially with respect to the drum. Signed at New York city, in the county of New York and State of New York.

ARON JOHNSON. 

